Starting Conditions (per tile):
268 moles of CO2
274 moles of Plasma
23,000K
+1% Tritium (added last)
The mix above initiated an energy consuming fusion reaction which quickly cooled below fusion temp. To reinitiate the reaction, more plasma and CO2 was injected in a 1:1 ratio at 10,000-20,000K, along with some oxygen and more tritium (the goal was to get the temp back above 10,000K and further increase the pressure).
Eventually an energy producing fusion reaction began and that's where this video starts.
(As shown by a test I performed off screen, starting with 1600 moles of CO2 and 1600 moles of plasma at 10,000K yields far more reliable results)
(Test performed on Citadel Station - Main)